<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="../assets/img5.jpg" alt />
      </div>
      <!-- 登录表单区域 -->
      <el-form
        ref="loginFormRef"
        :model="loginForm"
        :rules="loginFormRules"
        label-width="0px"
        class="login_form"
      >
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            prefix-icon="el-icon-user"
          ></el-input>
        </el-form-item>

        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            prefix-icon="el-icon-lock"
            type="password"
          ></el-input>
        </el-form-item>

        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" class="btn" @click="resetForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      loginForm: {
        username: "admin",
        password: "123456"
      },
      loginFormRules: {
        username: [
          { required: true, message: "请输入登录名称", trigger: "blur" },
          {
            min: 3,
            max: 15,
            message: "长度在 3 到 15 个字符",
            trigger: "blur"
          }
        ],
        password: [
          { required: true, message: "请输入密码", trigger: "blur" },
          {
            min: 6,
            max: 15,
            message: "长度在 6 到 15 个字符",
            trigger: "blur"
          }
        ]
      }
    };
  },
  methods: {
    resetForm() {
      // console.log(this);
      this.$refs.loginFormRef.resetFields();
    },
    login() {
      this.$refs.loginFormRef.validate(async valid => {
        // console.log(valid);
        if (!valid) {
          return;
        }
        const { data: res } = await this.$http.post("login", this.loginForm);
        // console.log(res);
        if (res.meta.status !== 200) {
          return this.$message.error("登录失败");
        }
        this.$message.success("登录成功");
        //1.将登录成功之后的token，保存到客户端sessionStorage中
        //1.1 项目中出现了除了登录之外的其他API接口，必须在登录之后才能访问
        //1.2 token只在当前网站期间打开有效，所以将其保存在sessionStoreg中
        // console.log(res);
        window.sessionStorage.setItem("token", res.data.token);
        //2. 通过编程式导航跳转到后台主页，路由地址是/home
        this.$router.push('/home')
      });
    }
  }
};
</script>

// scoped表示只在当前页有效
<style lang="less" scoped>
.login_container {
  // background: #353535;
  background-image: url('../assets/loginBg.jpg');
  background-repeat: no-repeat;
  background-size: cover;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
.avatar_box {
  width: 130px;
  height: 130px;
  border: 1px solid #eee;
  border-radius: 50%;
  padding: 10px;
  box-shadow: 0 0 10px #ddd;
  position: absolute;
  left: 50%;
  transform: translate(-50%, -50%);
  background: #fff;
  img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: #eee;
  }
}
.login_form {
  position: absolute;
  bottom: 0px;
  width: 100%;
  box-sizing: border-box;
  padding: 0 20px;
}
.btns {
  display: flex;
  justify-content: center;
  .btn {
    margin-left: 100px;
  }
}
</style>
